-er -ic b-u bbb bbc bbd bbe bbi bbm bbr bbu bcb bcc bcd bce bci bcm bcr bcu bdb bdc bdd bde bdi bdm bdr bdu be- beb bec bed bee bei bem ber beu bi- bib bic bid bie bii bim bir biu bmb bmc bmd bme bmi bmm bmr bmu brb brd bre bri brm brr bru bub buc bud bue bui bum bur buu c-- cbb cbc cbd cbe cbi cbm cbr cbu ccb ccc ccd cce cci ccm ccr ccu cdb cdc cdd cde cdi cdm cdr cdu ce- ceb cec ced cee cei cem cer ceu ci- cib cic cid cie cii cim cir ciu cmb cmc cmd cme cmi cmm cmr cmu crb crc crd cre cri crm crr cru cub cuc cud cue cui cum cur cuu dbb dbc dbd dbe dbi dbm dbr dbu dcb dcc dcd dce dci dcm dcr dcu ddb ddc ddd dde ddi ddm ddr ddu de- deb dec ded dee dei dem der deu di- dib dic did die dii dim dir diu dmb dmc dmd dme dmi dmm dmr dmu drb drc drd dre dri drm drr dru dub duc dud due dui dum dur ebb ebc ebd ebe ebi ebm ebr ebu ec- ecb ecc ecd ece eci ecm ecr ecu ed- edb edc edd ede edi edm edr edu eeb eec eed eee eem eer eib eic eid eie eii eim eir eiu em- emb emc emd eme emi emm emr emu erb erc erd ere eri erm err eru eu- eub euc eud eue eui eur i-d ibb ibc ibd ibe ibi ibm ibr ibu icb icc icd ice ici icm icr icu idb idc idd ide idi idm idr idu ie- iec ied iee iei iem ier iib iic iid iie iii iim iir iiu im- imb imc imd ime imi imm imu ir- irb irc ird ire iri irm irr iru iu- iub iuc iud iue iui ium iur m-r mbb mbc mbd mbe mbi mbm mbr mbu mc- mcb mcc mcd mce mci mcm mcr mcu mdb mdc mdd mde mdi mdm mdr mdu meb mec med mee mei mem mer meu mi- mib mic mid mie mii mim mir miu mmb mmc mmd mme mmi mmm mmr mmu mrb mrc mrd mre mri mrm mrr mru mub muc mud mue mui mum mur muu rbb rbc rbd rbe rbi rbm rbr rbu rcb rcc rcd rce rci rcm rcr rcu rdb rdc rdd rde rdi rdm rdr rdu re- reb rec red ree rei rem rer reu rib ric rid rie rii rim rir rmb rmc rmd rme rmi rmm rmr rrb rrc rrd rri rrm rrr rru rub ruc rud rue rui rum rur ruu ubb ubc ube ubi ubr ubu ucb ucc ucd uce uci ucm ucr ucu udb udc udd ude udi udm udr udu ueb uec ued uee uei uem uer uib uic uid uie uii uim uir uiu um- umb umc umd ume umi umm umr umu ur- urb urc urd ure uri urm urr uru uuc uue uum uur uuu